A ring having a cross-sectional area of 500 mm^2, a circumference of 400 mm and ϕ=800microWb has a coil of 200 turns wound around it. Relative permeability of ring is 380. Calculate the magnetising current.(a) 6.7A(b) 7.7A(c) 7.6(d) 6.1AThe question was asked in a job interview.This key question is from Ohm’s Law for a Magnetic Circuit topic in section Simple Magnetic Circuits of Basic Electrical Engineering

A ring having a cross-sectional area of 500 mm^2, a circumference of 4

1.	A ring having a cross-sectional area of 500 mm^2, a circumference of 400 mm and ϕ=800microWb has a coil of 200 turns wound around it. Relative permeability of ring is 380. Calculate the magnetising current.(a) 6.7A(b) 7.7A(c) 7.6(d) 6.1AThe question was asked in a job interview.This key question is from Ohm’s Law for a Magnetic Circuit topic in section Simple Magnetic Circuits of Basic Electrical Engineering
Answer» Right choice is (a) 6.7A For EXPLANATION: Reluctance = l/(µA) = l/(µrµ0A) SUBSTITUTING the VALUES, we get Reluctance S=1.68*106 A/Wb. F=ϕSSubstituting the given values, we get F = 1344At. I=F/NSubstituting the values from the question, we get I=6.7A.

Discussion

No Comment Found

Related InterviewSolutions

The B/H ratio is not constant for ________(a) Diamagnetic materials(b) Ferromagnetic materials(c) Paramagnetic materials(d) Non-magnetic materialsThis question was addressed to me in semester exam.This is a very interesting question from Determination of the B/H Characteristic topic in portion Simple Magnetic Circuits of Basic Electrical Engineering
Calculate the magnetic flux density if the magnetic field strength is 3A/m.(a) 4*pi*10^-7T(b) 8*pi*10^-7T(c) 10*pi*10^-7T(d) 12*pi*10^-7TThis question was addressed to me in an interview for internship.Question is from Permeability of Free Space or Magnetic Constant in chapter Simple Magnetic Circuits of Basic Electrical Engineering
Which, among the following, have negative susceptibility?(a) Diamagnetic(b) Paramagnetic(c) Ferromagnetic(d) Not a magnetic substanceThis question was addressed to me in semester exam.Question is from Permeability of Free Space or Magnetic Constant in chapter Simple Magnetic Circuits of Basic Electrical Engineering
Magnetic field exists along which of the following?(a) Moving charges(b) Stationary charges(c) Copper(d) IronI had been asked this question by my school teacher while I was bunking the class.I would like to ask this question from Magnetomotive Force and Magnetic Field Strength topic in chapter Simple Magnetic Circuits of Basic Electrical Engineering
The ballistic galvanometer is usually lightly damped so that ________(a) It can oscillate(b) It will remain stable(c) Amplitude of the first swing is very large(d) Amplitude of the first swing is very smallThe question was posed to me in an interview for internship.Origin of the question is Determination of the B/H Characteristic in division Simple Magnetic Circuits of Basic Electrical Engineering
Calculate the magnetic field strength if the magnetic flux density is 4*piT.(a) 10^-7/16*pi^2A/m(b) 10^-7A/m(c) 10^7A/m(d) 10^-7AI got this question in examination.My doubt is from Permeability of Free Space or Magnetic Constant in section Simple Magnetic Circuits of Basic Electrical Engineering
Diamagnetic substances have relative permeability_____________(a) Greater than 1(b) Less than 1(c) Equal to 1(d) ZeroThe question was asked in an interview.Asked question is from Relative Permeability in portion Simple Magnetic Circuits of Basic Electrical Engineering
PMMC instruments can be used as a fluxmeters by _______(a) Using a low resistance shunt(b) Removing the control spring(c) Making the control springs having a large moment of inertia(d) Using a high resistance in seriesI had been asked this question in homework.Query is from Determination of the B/H Characteristic topic in portion Simple Magnetic Circuits of Basic Electrical Engineering
A substance whose relative permeability is more than the permeability of free space is?(a) Diamagnetic(b) Paramagnetic(c) Ferromagnetic(d) Both paramagnetic and ferromagneticThis question was posed to me in my homework.This interesting question is from Relative Permeability topic in portion Simple Magnetic Circuits of Basic Electrical Engineering
Which among the following, is a correct expression for µ0.(a) µ0=BH(b) µ0=B/H(c) µ0=H/B(d) µ0=BH^2I got this question at a job interview.This intriguing question originated from Permeability of Free Space or Magnetic Constant topic in division Simple Magnetic Circuits of Basic Electrical Engineering

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment